X is 20 because 20/5 is 4 n 4+1=5
1 hundredth is equal to .01, so .01 * 128 = 1.28
Answer:
Step-by-step explanation:
For this exercise you need to use an Inverse Trigonometric Function called "Arctangent".
By definition:
You must observe carefully the triangle PQR shown in the picture attached.
In this case you can identify that:
Therefore, knowing those values you can substitute them into , as following:
Finally, evaluating, you get that the measure of the angle R is the following:
Rounding to the nearest tenth: